Ticking is not that that big of a deal to require a new engine. If your engine is knocking, it is a big deal. Make sure your car is ticking first. Ticking is usually caused by the valvetrain of the engine when it is not properly lubricated. As the engine increases oil pressure the oil makes its way into the valvetrain and the sound should go away. If it goes away when the engine is warm, it's likely ticking. If it is ticking, it sounds like you might be low on oil. Add a half quart see if it goes away. Then check your dipstick to make sure your are in the "safe zone." On some cars, you need to go above the "full" mark (ONLY A LITTLE, at most 1 quart over, which is about the same as the distance from full to low marks on the dipstick). It may need more oil, but use judgment from there. Hope that helped.
I do not think it is a big deal, if your engine makes ticking noise. I drive my Subaru seit 7 years with such kind of noise and never had any problems.. Do not replace engine for such small thing, most likely is your hyd.lifter a bit noisy. So what :))
Good luck.
http://www.lovehorsepower.com/SubaruDocs/LashAdjusterReplace.htmAudio file, video file and pictures outlining lifter replacement.
The 2003 Subaru Legacy has a flat 4 engine.
The 2012 Subaru Legacy has a flat 4 engine.
The 2007 Subaru Legacy has a flat 4 engine.
The 2002 Subaru Legacy has a flat 4 engine.
The 2001 Subaru Legacy has a flat 4 engine.
The 2014 Subaru Legacy has a flat 4 engine.
The 2009 Subaru Legacy has a flat 4 engine.
The 2013 Subaru Legacy has a flat 4 engine.
The 2010 Subaru Legacy has a flat 4 engine.
The 2005 Subaru Legacy has a flat 4 engine.
The 2008 Subaru Legacy has a flat 4 engine.